Not really. It's because the child does not have the ability to understand the theory at their then level. And sir also encourage the child to find the answer with their own efforts which will be better helpful. Who knows, we may get yet another physicist
This is a very nice question! The best explanation I know comes from Feynman, with a thought experiment that shows magnetic force is just electric force in a different frame of reference. Allow me to explain. Imagine a wire conducting electricity. Since it has a current, electrons are moving through it in one direction. And since the wire itself is neutral, if you take any segment of the wire at any instant, there will be equal number of electrons and protons in it (with the protons being static, and electrons zipping by). Now suppose another positive charge is moving along side the wire, very close to it, when the same speed as the electrons. If we change the frame of reference to move with the speed of the electrons, we see the new charge is static, as are the electrons. But the protons are zipping by in the opposite direction. Due to special relativity, and lorenz contraction, the distance between the protons will reduce. From this perspective, the density of protons will no longer be equal to the density of electrons in the wire, resulting a net positive charge field around the wire - so our new positive charge will experience a push. The magnetic force is precisely a way to express this force in the original frame of reference, where the new charge and electrons are in motion. There the moving electrons give rise to a magnetic field, which is felt by the positive charge as it's moving, perpendicular to it's motion and direction of the magnetic force leading it away from the wire - resulting in same set of events.
@@companiongaming3794 To understand this, the only two things that you need to know are (a) relativistic length contraction and (b) like charges repel. It's not too difficult, but it is best explained with examples and diagrams. I encourage you to search for RUclips videos on these topics there's ought to be many good ones. And/or ask anyone you trust might know about this locally!
@@ArnabBose you explained very well, but electric field is in itself not a real field ,and we use concept of field for Mathematical understanding of interaction of charges?
He is not physics influencer he is a physicist both are different things and don't compare him to influencers man he bought era of physics in India and on other hand most influencers are cringe
This is really an experimental fact, we doesn't really why happens at a deeper level. What special relativity says, it's just that an electric field of a point charge at rest is transformed to a magnetic field from your view point when you change to a moving reference frame. This is the reason why we usually say that magnetic and electric field are the same field.
A point charge has an E filed associated with it, and let's assume a test point a nearby. Now if the charge moves then vector E at the point a also changes. By Maxwell's eqn changeing E creates B and vice versa(curl E = -dB/dt & curl H = dD/dt ..). It's not the motion but change in E which matters.
Because question asked by student is 10th grade if sir start speeking about special theory of relativity he couldn't understand that is y sir said like that...
Thanks Sir. Just to summarize : 1) A static charge has the property that it produces Electric Field. 2) A charge when moving at uniform velocity has the property that it produces Magnetic Field. 3) A charge when moving under accelerated motion or is under an oscillatory motion, it generates time varying / oscillating coupled Electric Field and Magnetic Field which we call as Energy propagating in space i.e. Electromagnetic waves.
No under constant velocity charges produce both elec and magnetic field and under accelerated motionthey produce both types of fields as well as radiate energy. I dont know the reason as im preparing for jee so i didn't bother into relativity related topics
@@captainkarma7374 depends on frame of reference… nobody is moving at constant velocity ..space time of universe is accelerating and we are part of space time fabric
90% of students are watching this without searching Edit: Thanks for 3+k likes 2nd edit : moral of my comment is : to get like in comment do smart work not hard work😎😎😎
You would be paying more if you did the same thing with an AC, that is if you have set a low temperature,or your refrigerator for that matter. Therefore, I think your electricity consumption would be higher if you run the fan at a higher speed.
Yes. Wattage consumption of motor reduces if you run it at lower speed. However, that doesn't mean efficiency would necessarily improve. In short, yes bill would reduce. Hope this helps.
For anyone curious about why this happens, it's due to length contraction as explained by the special theory of relativity. Suppose there is a line of positive charges moving along the z-axis in the positive direction - a current. Consider a positive charge q located at (x,y,z)=(1,0,0), moving in the negative z-direction. We can see that there will be some electrostatic force on q due to all those charges. But from q's frame of reference, clearly the charges constituting the current will be moving faster in this frame. But that doesn't do much, since after all the Coulomb force clearly doesn't care about the velocity of the charges, only on their separation. But special relativity tells us something else. It says the current charges will appear closer together. If they were spaced apart by intervals Δz in the original frame, then in this new frame they will have a spacing Δz*√(1-v^2/c^2), where v is q's speed in the original frame. This is the length contraction predicted by special relativity. If the current charges appear closer together, then clearly q will feel a larger electrostatic force from the z-axis as a whole. It will experience an additional force in the positive x-direction, away from the axis, over and above what we would have predicted from just sitting in the lab frame. Basically, Coulomb's law is the only force law acting on a charge, but only the charge's rest frame is valid for using this law to determine what force the charge feels. Rather than constantly transforming back and forth between frames, we invent the magnetic field as a mathematical device that accomplishes the same thing. If defined properly, it will entirely account for this anomalous force seemingly experienced by the charge when we are observing it not in its own rest frame. In the example I just went through, the right-hand rule tells you we should ascribe a magnetic field to the current circling around the z-axis such that it is pointing in the positive y-direction at the location of q. The velocity of the charge is in the negative z-direction, and so qv⃗ ×B⃗ qv→×B→ points in the positive x-direction, just as we learned from changing reference frames.
@@Harsh-Singh-3.141 in this universe charges or matter is same till now as they form initially?. Means is this universe constantly changing it's form rather than the loss of single charge. May i know your qualification sir.
@@_.Infinity._ i just wish he doesn't get, it will create curiosity and to find that only point he will have to dig many other things and after he finds the answer, he will be Much knowledgeable Will love the topic and hence subject Will find things' connection in universe( as it is physics) And may be many more things .....
@@supremeessence5992 Yeah that's why sir HC Verma's books and other reputed books don't give solutions to all their questions. They do it solely with this intent in mind. Asking questions and then embarking your journey to find answers is what brings interest in things and is what has lead to all the great discoveries in the world. I myself developed my extreme love for mathematics this way.
This was actually on-point. Couldn't have stated it better. It makes me happy when students question the founding assumptions - these lead to deeper insights into how physics as a field of study works regardless of whether the question can be answered [for example, by pointing to a deeper layer] or remains unanswered [for the currently accepted true foundations of physics].
I myself searched for HC Verma on youtube when I was in class 11 during my jee preperations and was desperate he hasn't started it but iam in 2 nd year of my engineering in NIT now...and this came to my recommendations
I just want to thank you for writing those 2 wonderful books sir, it's because of those two books that I was able to get good marks in jee-physics(mains and advanced).which in turn, made sure that I got a decent rank of 6104(2018 mains general category). for anyone reading this as a jee aspirant I highly recommend solving concepts of physic vo1 and vol2, it was more than sufficient for me to crack jee. God speed.
@@mohithsathyanarayanan7882 Hi is HC verna enough for jee ? I am in 10th and i am really passionate for cse my maths and chemistry are sorted but physics i have just started to study?
Come in class 12th you see charge and current not need potential differnce ..and cell....and when you go to learn inductance .....then come on thiss chat and reply
Lol, and no one ever says what this magical 'Charge' is. Every attempt at an explanation to electricity always starts with "Suppose Charge Q exists at point X" It's beyond farcical.
In an atom the electrons moving revolve around the nucleus so it accelerated and according to the maxwell theory of electromagnetic radiation every accelerated charged particles releases both electric field and magnetic field which are perpendicular in direction of oscillation but same along the direction of propagation. I think its clear ♥♥
you are a true teacher sir. every science student needs a teacher like you at least once in his/her life. thank you for spreading knowledge the way you do. I am a 3rd year physics student and i still watch your videos .
@@scr_scr the person simply commented how they didnt know about magnetic field in 10th grade. i dont see the need to disrespect a particular religion under the comment. and you defending that comment shows how much of a pathetic person you are. hop off your double standards.
As far as my thinking goes I think that the electric and magnetic field induced by a moving particle are the same phenomenon viewed by different frames of reference. Think of it like this "you are negatively charged and hence are being pushed away from the particle that too happens to be negatively charged so from your pov you are being repelled because of the charge and someone else looking at you from their respective pov might think that you are being pushed away because of the magnetic field" let's suppose that you are stationary so it may seem to someone that you are not at all affected by the fields...this was the best explanation I could come up with...🙌🙌
What special relativity says, it's that an electric field of a point charge at rest is transformed to a magnetic field from your view point when you change to a moving reference frame. This is one of the reasons the reason why we usually say that magnetic and electric field are the same field.
Whether the charge is moving or rest it always has magnetic field.. Not just magnetic field but all fields... But the value of the m field is 0! Actually when it moves it doesn't create a magnetic field cuz its always been in magnetic field.. When it moves what it does is.. It creates a distortion in the magnetic field.. For example imagine urself in water when u don't move the water is calm nd all but when u move you create a distortion nd continues disturbance in water field... Thats exactly how quantum mechanics works! (Imagine a infinite huge multiple graphs with all values 0s in it! Interaction of quantum particles distorts the graph values from hiking the values !
He is like Physics ke "kaaleen bhaiya" for those who literally love physics...studying physics for class 11th and 12th in india is like answering all questions from book written by him.... Greatness is hided under humbleness, patience like him. Hats off for your immense work in the field of creating joyful physics..to elaborate the beauty of physics briefly.... Love and Respect to you sir! Have a healthy life, we need more "Kaaleen Bhaiya" of your types.
It's a good answer... It will satisfy the curiosity, knowing that there is a possible explanation and to get that one has to reach that level.. instead of neglecting the question...
I'm Abhinav.. currently I'm in 10 standard and I started reading this chapter from past 2 to 3 days and now RUclips recommend me this from Hc Verma sir ... that's great 😯
1:29. Explaining a concept on the basis of implications put by due to the fact you accepted the previously related concept as the intrinsic property of something in that concept. I have had this issue with so many teachers. Dear HC verma sir, you explained it in way that perhaps no one could have explained. In school I often come across concepts which are based on previous concepts. And the question arises in my mind "why". It happens to all concepts regardless they posses some intrinsic property or not. My teacher would also reverse the question by deriving some implications because I accepted the previous concept without asking why. Even if I would've asked why they would simply brush it off or avoid it. And now teachers want me to question why on every concept, how can I do that if I had been always told to accept what was being taught. IDK but that's biased. And my school teachers weren't that great. When I was in primary classes teacher would blame me for incapable to understand anything and calling me I could never ever do anything in my life. Well I proved them wrong in 10th standard by scoring 80percent. I know that's not enough but that's a lot for a average student who was always told "you will fail always". I guess education system needs to evolve, because I have realized how even a single wrong word taught by teachers can have significant impact on their learning capabilities and direct impact on perspective of child towards subject like these. I can provide you with an example when I was young like in 5 or 6. While solving algebra I encountered a problem with solving LHS and RHS, I asked to my teacher, instead of explaining me how the LHS and RHS concept work that teacher explained me how to solve the question, presuming that I already figured out the LHS and RHS concept. it seemed like I had to memorize these set of rules for every such question and that's how I was solving maths until I thought of something which kind of opened my mind. The idea was basically equal sign indicates that two given quantities are equal, and by the quantity I mean you can put anything on LHS and RHS and equal sign has the conceptual property to only let equal quantities put aside that sign. If those given quantities are equal than you don't have to do any effort to equalize them. When you're given RHS LHS you basically have to make one of those equal to each other by manipulating loopholes in conceptual property of equal sign. Equal sign says, two given quantities put aside has to be equal, it does not state in anyway if it has to be intrinsically equal or you have to make it equal. Equal sign demands if you wanna put quantities aside it, then it needs to be equal. It doesn't care if you're gonna make it equal or it's already equal. These abstract concepts like maths need to be translated with accurate correspondence with the respect to it's intrinsic conceptual property. In order to solve maths you just have to know if you need to solve problem then look at question accurately and extract exactly what it says. You have to find loopholes. Well when you're solving problems you have to exploit loopholes and use those as way to extract results. And that way is the concept which you often hear from teacher. Teachers speak the question, they will tell you concept used and explain it. But never tell how to figure loopholes. So what many student end up doing is they memorize and understand the concept and try to it figure out how you can align that concept with the given problem, they establish a mindset so whenever they encounter a problem they're like "yeah this number goes in this method like this way and this value you have to put here.. " You see they're just putting values without realizing why you have to put the values. Well you might say, you gotta put values to obtain result but that's not how it works. Well those values and numbers along with given relations depicts the exact state of problem, in consideration with state with respect to objective of problem. it then pictures combined what the problem is.
Sir i read your books till i passed +2 in 2009 CBSE and by god grace i scored 95 in physics and cleared PMT in 1st attempt and a great contribution was your concepts which are too good.May god bless you with good health.
When charge moves (wether positive or negative) it attracts the opposite charges nearby as per the magnitude of the charge or current. This attraction is one of the many causes(many of which are unknown)of electromagnetism.
Wonderful to hear from the legend. 😊. Sometimes I believe it gets confusing for beginner physics students as we usually learn about magnetic and electric field as a separate phenomenon and then come to know about their unification. However, its understandable as it might get difficult if we start explaining complex things first i.e special relativity and lorentz transformations. For simplicity, both electric and magnetic field are actually the same thing viewed differently in different frames of reference. Even a stationary charge will produce a magnetic field if we are moving w.r.t to it. What we perceived as electric field in one frame will be perceived as magnetic field in another frame of reference. But again, to understand these concepts clearly, we will have to abandon the newtonian mechanics that is so much rooted to our understanding that relativistic mechanics appears baffling to our minds.
Ok! Are u BSc Physics Graduate ? How can I better understand this frame of reference concept in context of electric & magnetic 🧲 field ? I am 12th Passed BSc Biotech Student
HC Verma shows his simplicity by saying that it's an property of charge, but he says "then there is much deeper theory..." That is the depth of HC Verma. Respected sir if all time...
It is so beautiful to have the same concept of special theory of relativity applied for two forces of nature in human range to have been observed. Gives a pathway to a complete new understanding for newtonian point of view😀
Sir I really love watching your lectures....not only you have written great Books but also you give superbly great lectures..... which are supeerrrrrr easy to understand and also the experiments you perform give a basic understanding of how does the particular thing take place.....I would be greatly honoured if I meet you once in my life......
Good wishes sir. As a 12th grader, i want to answer the question you asked ( though im not very sure of the answer. ) q- why does a charge produce magnetic field? a- a charge produces magnetic field to achieve neutrality. for example any positive charge A is suspended, it tends to attract any -A charge for neutrality, and hence, stability. It will continue to attract and hence effect a particular region with it's attraction until small charges of -dA charges neutralize it. however, i'm not able to explain the repulsion between the fields of two positive charges.
"How special relativity makes magnet work..." By veritasium and minutephysics Search for it on RUclips... U will get a better understanding of this concept and don't be afraid of physics concepts.. always try to understand the beauty behind it... Okay ? I am also in 10th class.. but I understood this concept long before...!!! Thanks
But their expanation is wrong Veritasium- why electrons moving when we percieve positive charges are stationary wont get dense and attract the positive charge outside wire
For the people who are like the dislikers are physics haters or envy Verma Ji, let me correct you people here. I am pretty sure the people who disliked are those 9th and 10th class smartasses who were expecting a textbook answer like the process of photosynthesis. Because both physics and Verma Ji cannot at all have haters. And a request to my younger brothers and sisters studying in 9th and 10th, follow your current curriculum and then focus on extra stuff in 11th and 12th. Trust me, after the beautiful journey of these two years your point of view for life and science will change forever. And what Verma Ji said that these properties are by default present, you guys will understand the true essence of his words after those two years. So, for now, whatever extra stuff you guys are reading, do it if you are understanding. If not, don't waste your time. Focus on your current curriculum. After your 11th and 12th and b.tech./b.sc. I am sure your minds will build up enough to think about these answers yourself.
Sir, I do agree with that first paragraph, but I think that not all people do that. I also am in eighth, and came here just to know how it all really works out. And this IS really a problem that while everyone expects to give birth to a hardworking and genius child, every teacher expects to have hardworking and intelligent children, but rarely( I don't have anything against teachers, I have utmost respect for them) does one help to really build that up. Some children just try to be over smart and ask idiotic questions, but if you take every child who asks a question higher than course for that, you are absolutely wrong. Sometimes, unknowingly, a question pops up in mind which is truly much higher than your ability to understand it just then , but it does. So the teacher may explain it as simply as possible. And believe me, students are not always as the wrong end. For example- my teacher had been discussing positive charge and negative charge, electroscope etc. for a week, and I just asked "Ma'am, can you please tell me what charge exactly is?". But the answer that I got was "you think you are so smart?" And then she went to every friend of mine and said Ill things about me to them. Was that apt?, sometimes teachers may also accept their inability to explain something simply, they are also humans, and it is not possible even for them to know everything. However, just accepting it increases your respect among students. Just constantly scolding a child and not telling the answer really hampers their curiosity towards studies as well. I could have been told that charge is a force exerted by subatomic particles and even smaller quarks and leptons(which you will come to know about later) and its positivity and negativity is just the different nature of the particle. But no, I was ridiculed and mocked at. Was that correct? No. And it can't be that you want a child to excel at study and not satisfy his curiosity at the same time. P.S - I have not said anything about Verma sir, please don't relate.
Charge at rest create only electric field. Charge at uniform motion create electric field and magnetic field both. Charge at non-uniform motion create electric field, magnetic field and radiates energy. I think it is whole up to 10th
I am happy to know,that now a days there exist a platform like your channel on which students can clear their doubts. When i was in class-x,then i also have so many question like that,after reading NCERT books,and no one answered my question.
I truly respect you Sir from the depth of my heart , I like understanding concepts of Physics and You are just a great inspiration how Physics should be taught and studied , We all love you sir.
Physics is complicated at subatomic level. There are a lot of principles related to mass ,motion and charge that you need to clear before knowing the real reason behind this. This is not a question to be answered, it is a topic to be discussed, as i can see more questions would arise while explaining this. And HC verma sir, you're amazing . 😎
@A K Well put, and i agree with most of what you are saying. However there is no need for the magical particle part. Electrons have never been proven to exist, they are but a concept only. Electricity IS magnetism (energy in disequilibrium). Cut out the middleman 'electron' and things become clear. Indeed, the vortex is everything, the product of magnetism displacing magnetism with the resultant mass (energy condensate) displacing at the golden ratio, which is the angle of magnetic bonding of water. Thanks for the read and its good to know that I'm not the only one out there, perhaps I'm not taking crazy pills after all.
I usually have these kind of doubts sir , during my jee preparation, but due to time constraints I leave them and focus on problems , but sir when I see your channel , most of the times my doubts get cleared
the actual answer lies in the theory of em waves 1) as sir said creating electric field is a fundamental property of a charged body 2) now, as charge oscillates, the electric fields are produced in the form of waves HERE THE WAVES OF ELECTRIC FIELD CAUSES TIME VARYING ELECTRIC FIELD as em waves chapter is taught after emi in which we get to know that a time varying electric field produces magnetic field (and also vice versa) THE ANSWER -- AS THE CHARGE MOVES IT PRODUCES ELECTRIC FIELD WHICH IS TIME VARYING WHICH CREATES MAGNETIC FIELD AND VICE VERSA (WHICH IS THE BASIC REASON FOR PRODUCTION OF EM WAVES BY AN OSCILLATING CHARGE) FINALLY WE GET TO KNOW THAT ELECTRIC FIELD (TIME VARYING) CAN INDUCE MAGNETIC FIELD
Bro from patna Sir has only told the answer in books. I too have this question and by lots of research I came to know this- Charges are just formed from electrons or protons( while proton doesn't move). Both electrons and quark( that combine to form protons) are the most basic source of magnetic field. Due to their spin, Charges create magnetic field in a specific Orientation represented by magnetic field lines. Now if the charges are moving, they are not spinning, but even though charges create magnetic field but not in an specific Orientation that is why when current flow though straight wires magnetic fields are not developed in the way they are developed in a bar, round etc. magnet. But why the magnetic fields form according to thumb rule. Now you would be surprised to know that this rule has created a mindset. In actuall the magnetic field produced by straight wire carrying current doesn't has any specific north or south pole. It is just an illusion. Bro if anyone is seeing this comment please like it so that whenever the patna boy see this video, he see this comment at top🙏
Kudos to ur explanation 👍👍👍👍👍 seriously I can see why this is THE BEST explanation from a normal student point of view I have seen thank you for this❤️
Thanks is not enough for your efforts sir We( engineers) are always grateful to you Although, right now I m working as software engineer . because of u I got highest marks in physics in my school
I think physics too has its limitations to inquiry. The nature of a phenomenon is sometimes beyond questioning and is accepted the way it is for furthering its use. For instance, why does gravitational force or for that matter electrostatic force follow an inverse square law? It is its nature isn't it. In case there is a rationale I ll be happy to get educated. It is in this context, often we can see physics or science is about studying the phenomenon and explaining it rather going to even cruder fundamentals of understanding why the nature of the phenomenon is what it is. And it is not that science does not aspire to do that but there are limitations in nature to make measurements on these aspects. However, as long as the process of enquiry persists, I believe we will eventually one day understand the broader "why" about these things.😊🙏
Nicely explained sir. Sir I have a question if we introduce Frame of reference here for charge then observation of charge from different frame of reference will give different results.... as for a rest Charge- (1)when observed from rest inertial frame we will observe only Electric field. (2) when observed from inertial frame moving with constant velocity the along with Electric field we will observe Magnetic field also. (3) When we observe the same rest charge from non-inertial Frame then along with Electric field we will observe Magnetic field as well as Electromagnetic waves. Then question is observed magnetic field and electromagnetic wave will be real or pseudo...?!...These all are contradictory and confusing.... Then what's about the fundamental property of charge that Charge is Non Relativistic Physical quality???
Bro I have read the special theory of relativity and after reading I feel that there is always a electro -magnetic field instead of single electric or magnetic field ...And pure electric field is a case where magnetic field value becomes zero and vice versa (which depends on moving frame of reference with constant velocity)and for accelerating frame of reference we have to study Einstein's general theory of relativity (be honest I haven't studied general theory of relativity)so yeah for clearing your confusion you must have to read special and general theory of relativity ...hope it will be beneficial for you thanks ☺️
same question when arise in my mind some time ago i got confused and then after reading EM WAVES chapter of class 12th i thought it's because moving charges emit EM radiations but today i find my self wrong this is actually a higher concept thanks to HC VEERMA SIR ♥ ♥
The relationship between a moving charge and the creation of a magnetic field is a fundamental aspect of electromagnetism described by the Biot-Savart law and Ampère's circuital law. The "why" behind this phenomenon is deeply rooted in the principles of physics and the mathematical formulations that describe the behavior of electric charges and currents. One way to understand this is through the concept of special relativity. According to special relativity, electric and magnetic fields are two aspects of the same phenomenon, known as the electromagnetic field. When a charge moves, its electric field undergoes transformations that result in the appearance of a magnetic field in the frame of reference of an observer moving with the charge. In simple terms, as a charged particle moves, its electric field undergoes changes that give rise to a magnetic field. This interplay between electric and magnetic fields is a fundamental feature of electromagnetism and is beautifully encapsulated in Maxwell's equations, which describe how electric and magnetic fields interact and propagate through space. In summary, the "why" behind a moving charge creating a magnetic field is deeply tied to the fundamental nature of electromagnetic interactions, as described by the laws of electromagnetism and special relativity. It's a consequence of the way electric and magnetic fields are interconnected in the fabric of the universe, as articulated by the mathematical models developed by physicists over the years.
You nailed the fundamental question, what I call, "Duality Hole". If a Charge particle is moving with respect to an Observer, the observer see Magnetic Field around it. But, if a second observer is moving along the charge particle, he will not see the magnetic field around the charge. That means, in the same Space Magnetic Field exist and does not exist. It is all about frame of reference movement. To solve the mystery, the Space Time Transformation with respect to speed was introduced, first by French Physicist Lawrence. If you plug the Relative Velocity instead of simple velocity into Maxwell equations, speed of Light come out to be Constant, irrespective of Frame of reference.
Searching on Internet, I found that the colours of electrons, protons and neutrons are blue, red and green respectively. Now, atoms form matters. So if the colour of all atoms(electrons, protons,neutrons) are same of all elements. So we must see same colour around us due to reflection of light. But this is not so. Why??? What are colours??? Why some objects reflects light in such a way, the object looks of varied colours??? By the way I know the concept of diffraction of light, as light is itself composed of 7 colours. Class- 10 Student's Question.
Don't believe in colors. World is colourless, its only because of human eyes and processing of brain this world is perceived colourful around us. To understand about "What are colors" understand "How human eye works".
In common use of English, "how" and "why" are often used as if they have the same definition. In physics, if one speaks carefully, only "how" should be used. Physicists can explain how a change of this or that is manifested, but can never answer why. "Why" requires a meta-physical explanation, but none are available that will satisfy everyone. Note that "why" implies there is motive or intent, while "how" does not. The "why" of physics is completely mysterious. Sometimes, quite often, physics can explain "how". It makes no sense that any particle has a charge but it seems that they do have such. It makes even less sense that moving charges would produce a magnetic field...why that instead of making butterflies or rivers? At the base of physics are axioms...understanding beyond the axiom is impossible, which is part of the definition of axiom. BTW, the explanation for charges and magnetism emerging from moving charges is withing the scope of understanding of year 10 students...maybe even year 8 or 6, since it is only an explanation of a magical property of matter that has been observed, not too much different than any observation.
You nailed it. Maths & models can't explain - only describe. Has anyone here actually defined the term "field"? Or "magnetism"? Nope. Nobody. What is the difference between dielectricity & magnetism? Gravity? Electricity? Nobody defines these in an of themselves. Einstein got at least one thing right, if you can't explain it, you probably don't understand it. Define your terms. Descriptions are not definitions.
I am pretty sure the meta physical interpretations will make sense only when one has a very very strong grip on the theories of electro magnetism. There's probably "some" deeper meaning but realising what it means would probably require an in depth understanding of physics, something which is only possible after years of rigourous studies. I noticed quite the same thing in medicine and surgery, on the face of it, it's entirely, entirely observational, but an in depth enquiry into all the observations creates a "synergism" that improves your understanding of the human body as a whole. Probably gives you a deep insight into how it all works. It's how surgeons are able to manage complex cases every day. There's NO set of guidelines as to how to approach each and every patient, but a well educated surgeon uses his understanding and intellect to predict the effects of what he's going to do, what's rational or not. Of course, surgery is much more simpler than, let's say, predicting the behaviour of black holes. Physics is more abstract, and that's why developing an innate understanding of physics is tougher.
Hlo sir ! I am Divyansh Kumar Singhania. I have a doubt which has not cleared yet from internet or elsewhere. Sir, my question is that In ampere's law why we add only those currents which are inside the loop and on the other side magnetic field (B) is considered as resultant of all the currents in that area.....why??? Sir please answer, I am eagerly waiting for your response.
Analogous to this, if a person moves in the society with a great zeal to do good (charge) he automatically builds a great luminous legacy (magnetic field) which everyone admires
In simple, magnetic field is electric field observer experience in different frame of reference, this is a consequence of special theory of relativity's length contraction. as the charges moving, the number of charges per unit length increases bcz charge frame is under motion, so you feel greater electric field strength than if you are moving with the charge, this extra force we refer as magnetic force. And note this phenomenon is always inevitable process, so we use the term electro-magnetic field in all our study. and why the magnetic force is right angle to moving charge?. that is bcz, if you put a another charge in place of observer the force makes charge moving in right angle direction. like this we can frame lot of questions, and you can see, how many things are connected, the theory which meant to describe speed and time has wider scope to answer many un-answered questions in classical-mechanics, electro-magnetism and so on.. always go a step further to see the beauty. thank you - question everything!
When there isn't a potential difference, 1 electron moves left and 1 moves Right. So they Cancel each other out. However when there is a PD. Both move Right with gaps between them.
I am also a class 10 student, and I am so perplexed by this question that it keeps reverberating in my mind. My question is why does electricity get induced. This property is used in generators too. Sir, I will be obliged to you if you can clear this doubt by replying to this comment.
The answer to the question begins with a postulate of special relativity which states that the laws of physics is the same in all reference frames. In order to reconcile the fact that a charge can produce an electric field in one frame, and a magnetic field in another, we must assume that a charge produces an electromagnetic field, which is the generalization of the electric and magnetic fields that exists not only in space, but in spacetime. Under this assumption, you will see different projections of this electromagnetic field depending on your frame. In one frame, say the rest frame, the projection can be strictly an electric field, but in the "lab" frame, you will see a different projection which can include a magnetic field. These projections can be obtained by applying a linear transformation to the electromagnetic field known as a Lorentz transformation, which is a mathematical object that can take you from one frame to another.
Sir, I am from class 10. I also have a doubt regarding the fact that the electrons in the conductors move randomly, why don't they move in a specified path in the electron sea model?
Because electrons have force of attraction of different nuclei with positive charge around it, but when you provide external higher potential the electrons moves towards it but still bear attraction due to nuclei which tends to create resistance.
"Model"...electron sea model is a model,and it is not bound to show conformity with other models...Also reality happens,irrespective of the fact that you model it or not,forget about how.
I have great respect for you as a teacher, but I must honestly say that I find these kinds of answers disheartening. They can contribute to a loss of interest in a subject. It's important to address curiosity in the moment, not defer it to future learning. In the context of a RUclips video aimed at an audience eager for knowledge, a response like "you should do a course on special theory of relativity to find a better answer" may not be very satisfying. It's more helpful to provide at least a brief explanation that aligns with the viewer's current level of understanding. I recognize this might be a common approach among many Indian teachers, I believe that immediate engagement and simpler explanations can be more inspiring for those seeking to learn.
Consider a neutral wire with some electrons and protons in equal numbers now let the electrons drift (current). Now imagine a proton near the wire moving with same velocity as the electrons in the wire , now here the theory of special relativity comes into play as in the frame of reference of proton, the proton and electrons in wire are moving with same velocity but proton in wire are not, hence the distance between the protons in the wire will decrease (by special relativity)which will increase the proton density in the wire therefore the proton outside will experience an electric field that will exert a force on the proton . Now if we look at this situation from non inertial frame the charge outside will appear to be moving so we have to consider a force in account of the moving charge which we call it magnetic force . So basically magnetic field is an electric field just from different frame of reference.
It totally depends on your frame if reference. If a charge is in motion and you are in ground frame then you will observe the magnetic field however if you are moving with the charge then you won't feel the effect of magnetic field but you will indeed observe the other component of electromagnetic wave that is electric field.
Sir I have a doubt in my mind which is something like this: I always feel that momentum and Force are same is it true or there is any kind of diff. Because im not getting the actual diff. between accleration and velocity it seems to be same...
Velocity and acceleration are not completely the same thing. Suppose a Car is moving with velocity 2m/s with a=3m/s² then acceleration tells you that it's velocity will increase with 3 m/s after every second. Then after 1 sec it's velocity become 5 m/s and after 2 sec it becomes 8 m/s. So 3 m/s gets added after every second. If this car is moving with constant velocity 2 m/s then it's acceleration is Zero. So acceleration tells us the rate at which velocity changes with respect to time.
I think you yourself said the answer by asking the question!!The keyword is DIFFERENCE😊 In simple terms, Momentum refers to measure of motion(mass x velocity) ok and force is proportional to rate of change in momentum, means force refers to DIFFERENCE in momentum. If difference in momentum of a body from intial to final state is zero, force measured is also zero
He said correct . To know more about the connection of electromagnetism and special relativity , there's a good video on minutephysics with a simple cat analogy .
Sir please answer this question On an open ground a motorist follows a track that turns to his left by an angle of 60 degree after every 500 m. Starting from a given turn specify the displacement of the motorist at the third, sixth and the eighth turn. Compare the magnitude of the displacement with the total path length covered by the motorist in each case.
Despite being the most popular author you are so kind and humble.
Great student ,great teacher 😊
For anyone, looking for an explanation in a simple way through Special Relativity.
ruclips.net/video/1TKSfAkWWN0/видео.html
@AP 309 don't try to act like a 1st world citizen. These comments are simply a waste of time.
Its not author
He is not a author he is a teacher and I feel someone with his intellect will always be humble and that's why people love him
Autocorrect: 99.9% of this are watching this without searching for this topic or channel
Salute to him
@Uttkarsh ' s world m me too
Why
Yaa
I searched it 🙄
@@aniketmahajan8422 same
the guy who questioned: Thats exactly how everyone reversed my question.
😂😂
@@sunaina_mor 69 likes
@@harshavardhanhajeri1753 yeah 😆
B... belieber...?
Not really. It's because the child does not have the ability to understand the theory at their then level. And sir also encourage the child to find the answer with their own efforts which will be better helpful. Who knows, we may get yet another physicist
This is a very nice question! The best explanation I know comes from Feynman, with a thought experiment that shows magnetic force is just electric force in a different frame of reference. Allow me to explain.
Imagine a wire conducting electricity. Since it has a current, electrons are moving through it in one direction. And since the wire itself is neutral, if you take any segment of the wire at any instant, there will be equal number of electrons and protons in it (with the protons being static, and electrons zipping by).
Now suppose another positive charge is moving along side the wire, very close to it, when the same speed as the electrons. If we change the frame of reference to move with the speed of the electrons, we see the new charge is static, as are the electrons. But the protons are zipping by in the opposite direction. Due to special relativity, and lorenz contraction, the distance between the protons will reduce. From this perspective, the density of protons will no longer be equal to the density of electrons in the wire, resulting a net positive charge field around the wire - so our new positive charge will experience a push.
The magnetic force is precisely a way to express this force in the original frame of reference, where the new charge and electrons are in motion. There the moving electrons give rise to a magnetic field, which is felt by the positive charge as it's moving, perpendicular to it's motion and direction of the magnetic force leading it away from the wire - resulting in same set of events.
Amazing!
I am class 8 student and I I am not able to understand your answer please write in short form
@@companiongaming3794 Grow up kid then uh will understand it in a better way coz the answer is as simple as it can!!
@@companiongaming3794 To understand this, the only two things that you need to know are (a) relativistic length contraction and (b) like charges repel.
It's not too difficult, but it is best explained with examples and diagrams.
I encourage you to search for RUclips videos on these topics there's ought to be many good ones. And/or ask anyone you trust might know about this locally!
@@ArnabBose you explained very well, but electric field is in itself not a real field ,and we use concept of field for Mathematical understanding of interaction of charges?
Others in lockdown - Tiktok vs RUclips
HC Verma - why does a moving charge create a magnetic field ??
bahut sahi bhai
He is a legend
you are late man. it was uploaded by sir hc verma in 28 april. Where youtube vs titok started from 3-4 may. be updated man.
No why does a static point charge produce electricity. Not moving.
Difference between uselss and productive people.
I cannot understand how the best Physics influencer in India can be so down to earth? Hats off sir!
No one is everyone has to 😅
Knowledge humbles a person.
They are not americans.
Not a physics influencer it’s physicist
He is not physics influencer he is a physicist both are different things and don't compare him to influencers man he bought era of physics in India and on other hand most influencers are cringe
Q. Why does moving charge creates magnetic field?
A. You will get to know after 4 - 5 years of study in special relativity.
Hahaha...! DuDe 😂
This is really an experimental fact, we doesn't really why happens at a deeper level. What special relativity says, it's just that an electric field of a point charge at rest is transformed to a magnetic field from your view point when you change to a moving reference frame. This is the reason why we usually say that magnetic and electric field are the same field.
Same dude
A point charge has an E filed associated with it, and let's assume a test point a nearby. Now if the charge moves then vector E at the point a also changes. By Maxwell's eqn changeing E creates B and vice versa(curl E = -dB/dt & curl H = dD/dt ..). It's not the motion but change in E which matters.
Because question asked by student is 10th grade if sir start speeking about special theory of relativity he couldn't understand that is y sir said like that...
Thanks Sir.
Just to summarize :
1) A static charge has the property that it produces Electric Field.
2) A charge when moving at uniform velocity has the property that it produces Magnetic Field.
3) A charge when moving under accelerated motion or is under an oscillatory motion, it generates time varying / oscillating coupled Electric Field and Magnetic Field which we call as Energy propagating in space i.e. Electromagnetic waves.
What is motion/velocity....it's rate of change of position.....but wrt to what....so frame of reference come into picture....
Light is also electromagnetic wave
No under constant velocity charges produce both elec and magnetic field and under accelerated motionthey produce both types of fields as well as radiate energy. I dont know the reason as im preparing for jee so i didn't bother into relativity related topics
@@captainkarma7374 depends on frame of reference… nobody is moving at constant velocity ..space time of universe is accelerating and we are part of space time fabric
@@jgbains yes it does, thats why we define lorentz force
90% of students are watching this without searching
Edit:
Thanks for 3+k likes
2nd edit : moral of my comment is : to get like in comment do smart work not hard work😎😎😎
SO TRUEEEEEEE
That's RUclips's algorithm for you
Yeah! That's True........
Ha ha. Yes
Yah am one of them
I never knew he also had his youtube channel....getting answer from the legend itself lol
@@jeestudent6758 lol sahi
@@satwikgupta3369 sahi bole
@@satwikgupta3369 ABEEE PUBG BANNN HO GYA HAI NAHI PATA KYA
Bhai tumhari toh 🤣😂😂lag gyai bhai
Ya
Sir does running fan at 4 speed and at 1 speed makes any difference on electricity bill ?
You would be paying more if you did the same thing with an AC, that is if you have set a low temperature,or your refrigerator for that matter. Therefore, I think your electricity consumption would be higher if you run the fan at a higher speed.
Yes. Wattage consumption of motor reduces if you run it at lower speed.
However, that doesn't mean efficiency would necessarily improve.
In short, yes bill would reduce.
Hope this helps.
😊😊😊😅😅😅😅😅😅🤣🤣🤣🤣🤣🤣🤣
You call yourself "Academy" with that question?
@@romeobassin2524 Ain't No one giving a F about you. Mind your Business will Ya?
He is so humble..that's exactly how a person should be!!
For anyone curious about why this happens, it's due to length contraction as explained by the special theory of relativity.
Suppose there is a line of positive charges moving along the z-axis in the positive direction - a current. Consider a positive charge q located at (x,y,z)=(1,0,0), moving in the negative z-direction. We can see that there will be some electrostatic force on q due to all those charges.
But from q's frame of reference, clearly the charges constituting the current will be moving faster in this frame. But that doesn't do much, since after all the Coulomb force clearly doesn't care about the velocity of the charges, only on their separation. But special relativity tells us something else. It says the current charges will appear closer together. If they were spaced apart by intervals Δz in the original frame, then in this new frame they will have a spacing Δz*√(1-v^2/c^2), where v is q's speed in the original frame. This is the length contraction predicted by special relativity.
If the current charges appear closer together, then clearly q will feel a larger electrostatic force from the z-axis as a whole. It will experience an additional force in the positive x-direction, away from the axis, over and above what we would have predicted from just sitting in the lab frame.
Basically, Coulomb's law is the only force law acting on a charge, but only the charge's rest frame is valid for using this law to determine what force the charge feels.
Rather than constantly transforming back and forth between frames, we invent the magnetic field as a mathematical device that accomplishes the same thing. If defined properly, it will entirely account for this anomalous force seemingly experienced by the charge when we are observing it not in its own rest frame. In the example I just went through, the right-hand rule tells you we should ascribe a magnetic field to the current circling around the z-axis such that it is pointing in the positive y-direction at the location of q. The velocity of the charge is in the negative z-direction, and so qv⃗ ×B⃗ qv→×B→ points in the positive x-direction, just as we learned from changing reference frames.
Anyone read the whole Theory. Bro i 🤔 you have much knowledge so can you pls take a look of my question.
You're a legend
@@hope6577 Yes, What's your question? Yes I have read the special theory of relativity if u were asking, I work in theoretical physics only.
@@Kirtiraj_Deshmukh Thanx🙂, keep on learning Physics, it's a wonderful experience
@@Harsh-Singh-3.141 in this universe charges or matter is same till now as they form initially?. Means is this universe constantly changing it's form rather than the loss of single charge. May i know your qualification sir.
Every single video,he always smiles. What a great teacher. I've also learned physics from so many of his videos
But sad he still can't address the genuine physics doubts with a smile
The guy who asked the question is still perplexed 😅😂.
😂 yeah, I think the same. However he will find the answer if he opts for Science as his stream after 10th.
@@_.Infinity._ i just wish he doesn't get, it will create curiosity and to find that only point he will have to dig many other things and after he finds the answer, he will be
Much knowledgeable
Will love the topic and hence subject
Will find things' connection in universe( as it is physics)
And may be many more things .....
@@supremeessence5992 Yeah that's why sir HC Verma's books and other reputed books don't give solutions to all their questions. They do it solely with this intent in mind. Asking questions and then embarking your journey to find answers is what brings interest in things and is what has lead to all the great discoveries in the world. I myself developed my extreme love for mathematics this way.
ruclips.net/video/dkK4Q53Amg0/видео.html
😂😂😂😂
This was actually on-point. Couldn't have stated it better. It makes me happy when students question the founding assumptions - these lead to deeper insights into how physics as a field of study works regardless of whether the question can be answered [for example, by pointing to a deeper layer] or remains unanswered [for the currently accepted true foundations of physics].
If physics fascinates you then this channel is for you ruclips.net/user/shortsh1EvNcxfk7I?si=vwp-jsfBQ06qMTGs
I myself searched for HC Verma on youtube when I was in class 11 during my jee preperations and was desperate he hasn't started it but iam in 2 nd year of my engineering in NIT now...and this came to my recommendations
I am watching this 3rd time and I am just 10th standard
@@sriharshaveerapaneni3693 keep it on chap.
And I'm a bio student😆
Bhai 2018 ka batch hai Kya
Memories bring back
Memories bring back
I just want to thank you for writing those 2 wonderful books sir, it's because of those two books that I was able to get good marks in jee-physics(mains and advanced).which in turn, made sure that I got a decent rank of 6104(2018 mains general category). for anyone reading this as a jee aspirant I highly recommend solving concepts of physic vo1 and vol2, it was more than sufficient for me to crack jee. God speed.
ohh congratulations bro where did u join?/?
@@bhavanahasthi7109 thank you😊. I am presently pursuing a cse integrated masters degree from IIIT-BANGALORE.all the best to you.
@@mohithsathyanarayanan7882 Hi is HC verna enough for jee ? I am in 10th and i am really passionate for cse my maths and chemistry are sorted but physics i have just started to study?
bhaiya hc Verma for physics and what for chemistry and mathematics
Physics Class 8 : "Current is movement of charge "
Physics Class 11 : " wEtHeR cHaRgE iS mOvInG oR nOt dEpEnDs oN fRaMe oF rEfReNcE oR oBsErVeR "
LOL
Come in class 12th you see charge and current not need potential differnce ..and cell....and when you go to learn inductance .....then come on thiss chat and reply
@@musicalhits1082 exactly!!
@@musicalhits1082 wait, why not?
Lol, and no one ever says what this magical 'Charge' is. Every attempt at an explanation to electricity always starts with "Suppose Charge Q exists at point X" It's beyond farcical.
In an atom the electrons moving revolve around the nucleus so it accelerated and according to the maxwell theory of electromagnetic radiation every accelerated charged particles releases both electric field and magnetic field which are perpendicular in direction of oscillation but same along the direction of propagation. I think its clear ♥♥
you are a true teacher sir. every science student needs a teacher like you at least once in his/her life. thank you for spreading knowledge the way you do. I am a 3rd year physics student and i still watch your videos .
I don't know why but his face and innocence brings a smile on my face🙂🙂
Probably, the first youtuber who don't use thumbnail.
Naam hi kaafi hai
And don't have a profile either. SIMPLICITY.
Not everyone who uploades a video on youtube is a youtuber. He is a famous Physics professor
Sir, I had the same query since 5 days, and was trying to find the answer. And I found it❤️. With Great Respect.🙏
When i was in class 10, i didnt even know charge creates magnetic field.
yea obv cos u read only quran
@@sb.sb.sb. please be respectful
Same because in our syllabus its in 12th
@@vpr17 If they respect us they will get repscted too
@@scr_scr the person simply commented how they didnt know about magnetic field in 10th grade. i dont see the need to disrespect a particular religion under the comment. and you defending that comment shows how much of a pathetic person you are. hop off your double standards.
Sir, I'm also from Patna , Bihar and my name is also Amar and even I'm in class 10th😅....how similar!
BC , 1.35 crore population
Nothing is shocking here
the population of india says hi
i have 5 aayush named classmates...... and they are all in same school so not surprising...
Plot twist: You are only the one who asked the question
@@demonking1101 Ayush is a too much common name.
such a sweet , humble and decent personality
its an honour to watch such a living prodigy
As far as my thinking goes I think that the electric and magnetic field induced by a moving particle are the same phenomenon viewed by different frames of reference. Think of it like this "you are negatively charged and hence are being pushed away from the particle that too happens to be negatively charged so from your pov you are being repelled because of the charge and someone else looking at you from their respective pov might think that you are being pushed away because of the magnetic field" let's suppose that you are stationary so it may seem to someone that you are not at all affected by the fields...this was the best explanation I could come up with...🙌🙌
We need students and questions like this. All scientists think on same way.
Why and how things behave the way they behave.
ruclips.net/video/HksZJLRCuIY/видео.html
ruclips.net/video/1TKSfAkWWN0/видео.html
@@anjalkumar6478 😬
🙄🙄🤔🤔🤔
Thanks
What special relativity says, it's that an electric field of a point charge at rest is transformed to a magnetic field from your view point when you change to a moving reference frame. This is one of the reasons the reason why we usually say that magnetic and electric field are the same field.
Can you explain that without bunch of protons shrink to each other? With only two charged particles moving relative to each other.
Understood! Thanks i didn't think i would get it
Hatt's being such a famous author, u made many students life colourful and then also u r so humble and polite.
Whether the charge is moving or rest it always has magnetic field.. Not just magnetic field but all fields... But the value of the m field is 0! Actually when it moves it doesn't create a magnetic field cuz its always been in magnetic field.. When it moves what it does is.. It creates a distortion in the magnetic field.. For example imagine urself in water when u don't move the water is calm nd all but when u move you create a distortion nd continues disturbance in water field... Thats exactly how quantum mechanics works! (Imagine a infinite huge multiple graphs with all values 0s in it! Interaction of quantum particles distorts the graph values from hiking the values !
reclaimer 117
is the magnetic and the electric field not just the same field acting different depending on the charged objects velocity.
Are u saying they are intertwined fields in the electron
@reclaimer111, can i ask what is the proof that a charge at rest has magnetic field too?
How can you say that?
moving charges result in length contraction of charges and hence creates an electric field as well as magnetic field
You know everything we are idiots
He is like Physics ke "kaaleen bhaiya" for those who literally love physics...studying physics for class 11th and 12th in india is like answering all questions from book written by him....
Greatness is hided under humbleness, patience like him.
Hats off for your immense work in the field of creating joyful physics..to elaborate the beauty of physics briefly....
Love and Respect to you sir!
Have a healthy life, we need more "Kaaleen Bhaiya" of your types.
Abe to jeetu bhaiya hai
It's a good answer... It will satisfy the curiosity, knowing that there is a possible explanation and to get that one has to reach that level.. instead of neglecting the question...
I'm Abhinav.. currently I'm in 10 standard and I started reading this chapter from past 2 to 3 days and now RUclips recommend me this from Hc Verma sir ... that's great 😯
1:29. Explaining a concept on the basis of implications put by due to the fact you accepted the previously related concept as the intrinsic property of something in that concept. I have had this issue with so many teachers. Dear HC verma sir, you explained it in way that perhaps no one could have explained. In school I often come across concepts which are based on previous concepts. And the question arises in my mind "why". It happens to all concepts regardless they posses some intrinsic property or not. My teacher would also reverse the question by deriving some implications because I accepted the previous concept without asking why. Even if I would've asked why they would simply brush it off or avoid it. And now teachers want me to question why on every concept, how can I do that if I had been always told to accept what was being taught. IDK but that's biased. And my school teachers weren't that great. When I was in primary classes teacher would blame me for incapable to understand anything and calling me I could never ever do anything in my life. Well I proved them wrong in 10th standard by scoring 80percent. I know that's not enough but that's a lot for a average student who was always told "you will fail always". I guess education system needs to evolve, because I have realized how even a single wrong word taught by teachers can have significant impact on their learning capabilities and direct impact on perspective of child towards subject like these. I can provide you with an example when I was young like in 5 or 6. While solving algebra I encountered a problem with solving LHS and RHS, I asked to my teacher, instead of explaining me how the LHS and RHS concept work that teacher explained me how to solve the question, presuming that I already figured out the LHS and RHS concept. it seemed like I had to memorize these set of rules for every such question and that's how I was solving maths until I thought of something which kind of opened my mind. The idea was basically equal sign indicates that two given quantities are equal, and by the quantity I mean you can put anything on LHS and RHS and equal sign has the conceptual property to only let equal quantities put aside that sign. If those given quantities are equal than you don't have to do any effort to equalize them. When you're given RHS LHS you basically have to make one of those equal to each other by manipulating loopholes in conceptual property of equal sign. Equal sign says, two given quantities put aside has to be equal, it does not state in anyway if it has to be intrinsically equal or you have to make it equal. Equal sign demands if you wanna put quantities aside it, then it needs to be equal. It doesn't care if you're gonna make it equal or it's already equal. These abstract concepts like maths need to be translated with accurate correspondence with the respect to it's intrinsic conceptual property. In order to solve maths you just have to know if you need to solve problem then look at question accurately and extract exactly what it says. You have to find loopholes.
Well when you're solving problems you have to exploit loopholes and use those as way to extract results. And that way is the concept which you often hear from teacher. Teachers speak the question, they will tell you concept used and explain it. But never tell how to figure loopholes. So what many student end up doing is they memorize and understand the concept and try to it figure out how you can align that concept with the given problem, they establish a mindset so whenever they encounter a problem they're like "yeah this number goes in this method like this way and this value you have to put here.. " You see they're just putting values without realizing why you have to put the values. Well you might say, you gotta put values to obtain result but that's not how it works. Well those values and numbers along with given relations depicts the exact state of problem, in consideration with state with respect to objective of problem. it then pictures combined what the problem is.
most humble person i ve ever seen sir hats off to you
andyour knowledge
Sir i read your books till i passed +2 in 2009 CBSE and by god grace i scored 95 in physics and cleared PMT in 1st attempt and a great contribution was your concepts which are too good.May god bless you with good health.
Sir I am really shocked to see such a popular man ; with such humbleness. Hats off to you ! I bow down before you
14 people disliking this are those who studied from guides and failed in Physics. Yaha khunnas nikal rahe hain.
I think they dislike the answer, not the sir.
Sach Kaha Apne 😁
I know one disliker I think his name started with an SL & then ended with Arora
A very unusual name....
@@anandmahamuni5442 Kuch bhi
@@jakejones6481 Here come their true believers.....
When charge moves (wether positive or negative) it attracts the opposite charges nearby as per the magnitude of the charge or current. This attraction is one of the many causes(many of which are unknown)of electromagnetism.
Such a humble person sir is♥️♥️
Wonderful to hear from the legend. 😊. Sometimes I believe it gets confusing for beginner physics students as we usually learn about magnetic and electric field as a separate phenomenon and then come to know about their unification. However, its understandable as it might get difficult if we start explaining complex things first i.e special relativity and lorentz transformations.
For simplicity, both electric and magnetic field are actually the same thing viewed differently in different frames of reference.
Even a stationary charge will produce a magnetic field if we are moving w.r.t to it. What we perceived as electric field in one frame will be perceived as magnetic field in another frame of reference.
But again, to understand these concepts clearly, we will have to abandon the newtonian mechanics that is so much rooted to our understanding that relativistic mechanics appears baffling to our minds.
Ok! Are u BSc Physics Graduate ? How can I better understand this frame of reference concept in context of electric & magnetic 🧲 field ? I am 12th Passed BSc Biotech Student
very well said!
Yaar itne humble person ko q dislike kar te ho
Log bewkuf hai ab jis person padam shri award mila ho uskobbhi dis like kar rahe hai to kya kar sakte hai
Bhai.... I guess woh log jee advance clear nahi Kar paya... 😂😂Isliye dislike kiya
those who haven't complete HCV 😁😁
those are the guys who have done extreme research on the theory of relativity and knew a better answer than hc Verma sir!! LOL😂😂😂😂😆😆
I think that they thik themselves to be scientist like Newton or Einstein
जब सुकून ना मिले दिखावे की बस्ती में,
तब खो जाना मेरे श्याम की मस्ती में..!!
🙏❤️ राधे राधे 🙏❤️
I used to love physics!! I wish I would have focused more. Respect!!!
HC Verma shows his simplicity by saying that it's an property of charge, but he says "then there is much deeper theory..." That is the depth of HC Verma. Respected sir if all time...
How lucky his children's... A great physician always with them...✌️✌️✌️
physicist*
No one is having that luck bro. Because he is not married
It is so beautiful to have the same concept of special theory of relativity applied for two forces of nature in human range to have been observed. Gives a pathway to a complete new understanding for newtonian point of view😀
Sir I really love watching your lectures....not only you have written great Books but also you give superbly great lectures..... which are supeerrrrrr easy to understand and also the experiments you perform give a basic understanding of how does the particular thing take place.....I would be greatly honoured if I meet you once in my life......
Good wishes sir. As a 12th grader, i want to answer the question you asked ( though im not very sure of the answer. )
q- why does a charge produce magnetic field?
a- a charge produces magnetic field to achieve neutrality. for example any positive charge A is suspended, it tends to attract any
-A charge for neutrality, and hence, stability. It will continue to attract and hence effect a particular region with it's attraction until small charges of -dA charges neutralize it. however, i'm not able to explain the repulsion between the fields of two positive charges.
"How special relativity makes magnet work..." By veritasium and minutephysics Search for it on RUclips... U will get a better understanding of this concept and don't be afraid of physics concepts.. always try to understand the beauty behind it... Okay ? I am also in 10th class.. but I understood this concept long before...!!! Thanks
ruclips.net/video/1TKSfAkWWN0/видео.html
Check it HC VERMA sir's lecture on advance special relativite in which he has discussed this in better than minute physics.
First time - Special Theory of Relativity makes Quantum Particle ( Charge ) to produce Magnet Field .
Me 10 th
But their expanation is wrong
Veritasium- why electrons moving when we percieve positive charges are stationary wont get dense and attract the positive charge outside wire
Dont see veritasium video its wrong explanation
For the people who are like the dislikers are physics haters or envy Verma Ji, let me correct you people here. I am pretty sure the people who disliked are those 9th and 10th class smartasses who were expecting a textbook answer like the process of photosynthesis. Because both physics and Verma Ji cannot at all have haters.
And a request to my younger brothers and sisters studying in 9th and 10th, follow your current curriculum and then focus on extra stuff in 11th and 12th. Trust me, after the beautiful journey of these two years your point of view for life and science will change forever. And what Verma Ji said that these properties are by default present, you guys will understand the true essence of his words after those two years.
So, for now, whatever extra stuff you guys are reading, do it if you are understanding. If not, don't waste your time. Focus on your current curriculum. After your 11th and 12th and b.tech./b.sc. I am sure your minds will build up enough to think about these answers yourself.
Can you give me your email
Sir, I do agree with that first paragraph, but I think that not all people do that.
I also am in eighth, and came here just to know how it all really works out. And this IS really a problem that while everyone expects to give birth to a hardworking and genius child, every teacher expects to have hardworking and intelligent children, but rarely( I don't have anything against teachers, I have utmost respect for them) does one help to really build that up. Some children just try to be over smart and ask idiotic questions, but if you take every child who asks a question higher than course for that, you are absolutely wrong. Sometimes, unknowingly, a question pops up in mind which is truly much higher than your ability to understand it just then , but it does. So the teacher may explain it as simply as possible. And believe me, students are not always as the wrong end. For example- my teacher had been discussing positive charge and negative charge, electroscope etc. for a week, and I just asked "Ma'am, can you please tell me what charge exactly is?". But the answer that I got was "you think you are so smart?" And then she went to every friend of mine and said Ill things about me to them. Was that apt?, sometimes teachers may also accept their inability to explain something simply, they are also humans, and it is not possible even for them to know everything. However, just accepting it increases your respect among students. Just constantly scolding a child and not telling the answer really hampers their curiosity towards studies as well. I could have been told that charge is a force exerted by subatomic particles and even smaller quarks and leptons(which you will come to know about later) and its positivity and negativity is just the different nature of the particle. But no, I was ridiculed and mocked at. Was that correct? No. And it can't be that you want a child to excel at study and not satisfy his curiosity at the same time.
P.S - I have not said anything about Verma sir, please don't relate.
He is such a humble person I want to meet him once in my life... He is far better than my physics teacher in my school 😊😊❤️
*Legend of PHYSICS from INDIA 🇮🇳❤🙏.. कोटि कोटि प्रणाम हरियाणा से 🙏*
Charge at rest create only electric field.
Charge at uniform motion create electric field and magnetic field both.
Charge at non-uniform motion create electric field, magnetic field and radiates energy.
I think it is whole up to 10th
No bro not upto 10th
U are saying just result of these theories
But his question is how this result came ok.
So sir is definitely correct as always.
you are saying charge creates electric field but I dont think so its true coz the charge particle in motion or rest is itself electrical entity...🤔
@@abhilashatripathy1447 you will study it in 12th
@@shivamgupta-ml5kx it's just an intrinsic property...which was experimentally noticed...and a hypothetical theory was given.....
Because electric field has magnetic field
I am happy to know,that now a days there exist a platform like your channel on which students can clear their doubts.
When i was in class-x,then i also have so many question like that,after reading NCERT books,and no one answered my question.
Same
RUclips recommended me this, but grateful to have seen
Same here😂😂😂
I truly respect you Sir from the depth of my heart , I like understanding concepts of Physics and You are just a great inspiration how Physics should be taught and studied , We all love you sir.
Physics is complicated at subatomic level. There are a lot of principles related to mass ,motion and charge that you need to clear before knowing the real reason behind this. This is not a question to be answered, it is a topic to be discussed, as i can see more questions would arise while explaining this.
And HC verma sir, you're amazing . 😎
@A K Well put, and i agree with most of what you are saying. However there is no need for the magical particle part. Electrons have never been proven to exist, they are but a concept only. Electricity IS magnetism (energy in disequilibrium). Cut out the middleman 'electron' and things become clear. Indeed, the vortex is everything, the product of magnetism displacing magnetism with the resultant mass (energy condensate) displacing at the golden ratio, which is the angle of magnetic bonding of water. Thanks for the read and its good to know that I'm not the only one out there, perhaps I'm not taking crazy pills after all.
I usually have these kind of doubts sir , during my jee preparation, but due to time constraints I leave them and focus on problems , but sir when I see your channel , most of the times my doubts get cleared
the actual answer lies in the theory of em waves
1) as sir said creating electric field is a fundamental property of a charged body
2) now, as charge oscillates, the electric fields are produced in the form of waves HERE THE WAVES OF ELECTRIC FIELD CAUSES TIME VARYING ELECTRIC FIELD
as em waves chapter is taught after emi in which we get to know that a time varying electric field produces magnetic field (and also vice versa)
THE ANSWER -- AS THE CHARGE MOVES IT PRODUCES ELECTRIC FIELD WHICH IS TIME VARYING WHICH CREATES MAGNETIC FIELD AND VICE VERSA (WHICH IS THE BASIC REASON FOR PRODUCTION OF EM WAVES BY AN OSCILLATING CHARGE)
FINALLY WE GET TO KNOW THAT ELECTRIC FIELD (TIME VARYING) CAN INDUCE MAGNETIC FIELD
UNO REVERSE: why does a time varying electric field produce magnetic field
Bro from patna Sir has only told the answer in books. I too have this question and by lots of research I came to know this-
Charges are just formed from electrons or protons( while proton doesn't move). Both electrons and quark( that combine to form protons) are the most basic source of magnetic field. Due to their spin, Charges create magnetic field in a specific Orientation represented by magnetic field lines. Now if the charges are moving, they are not spinning, but even though charges create magnetic field but not in an specific Orientation that is why when current flow though straight wires magnetic fields are not developed in the way they are developed in a bar, round etc. magnet. But why the magnetic fields form according to thumb rule. Now you would be surprised to know that this rule has created a mindset. In actuall the magnetic field produced by straight wire carrying current doesn't has any specific north or south pole. It is just an illusion.
Bro if anyone is seeing this comment please like it so that whenever the patna boy see this video, he see this comment at top🙏
kudos Bro, exact explanation
Basically magnetic field is from electron spin , but for kids can give explanation with motion of electrons
Kudos to ur explanation 👍👍👍👍👍 seriously I can see why this is THE BEST explanation from a normal student point of view I have seen thank you for this❤️
thank you bhaiya ♥. I am that Patna Guy.
I’m a lawyer with 6 years experience and I just like to watch his videos for answers to the universe.
Thanks is not enough for your efforts sir
We( engineers) are always grateful to you
Although, right now I m working as software engineer .
because of u I got highest marks in physics in my school
I think physics too has its limitations to inquiry. The nature of a phenomenon is sometimes beyond questioning and is accepted the way it is for furthering its use. For instance, why does gravitational force or for that matter electrostatic force follow an inverse square law? It is its nature isn't it. In case there is a rationale I ll be happy to get educated. It is in this context, often we can see physics or science is about studying the phenomenon and explaining it rather going to even cruder fundamentals of understanding why the nature of the phenomenon is what it is. And it is not that science does not aspire to do that but there are limitations in nature to make measurements on these aspects. However, as long as the process of enquiry persists, I believe we will eventually one day understand the broader "why" about these things.😊🙏
Nicely explained sir.
Sir I have a question if we introduce Frame of reference here for charge then observation of charge from different frame of reference will give different results....
as for a rest Charge-
(1)when observed from rest inertial frame we will observe only Electric field.
(2) when observed from inertial frame moving with constant velocity the along with Electric field we will observe Magnetic field also.
(3) When we observe the same rest charge from non-inertial Frame then along with Electric field we will observe Magnetic field as well as Electromagnetic waves.
Then question is observed magnetic field and electromagnetic wave will be real or pseudo...?!...These all are contradictory and confusing....
Then what's about the fundamental property of charge that Charge is Non Relativistic Physical quality???
Bro I have read the special theory of relativity and after reading I feel that there is always a electro -magnetic field instead of single electric or magnetic field ...And pure electric field is a case where magnetic field value becomes zero and vice versa (which depends on moving frame of reference with constant velocity)and for accelerating frame of reference we have to study Einstein's general theory of relativity (be honest I haven't studied general theory of relativity)so yeah for clearing your confusion you must have to read special and general theory of relativity ...hope it will be beneficial for you thanks ☺️
same question when arise in my mind some time ago i got confused and then after reading EM WAVES chapter of class 12th i thought it's because moving charges emit EM radiations but today i find my self wrong this is actually a higher concept
thanks to HC VEERMA SIR ♥ ♥
I'm in first year of engineering but still watching this out of pure interest.
The relationship between a moving charge and the creation of a magnetic field is a fundamental aspect of electromagnetism described by the Biot-Savart law and Ampère's circuital law. The "why" behind this phenomenon is deeply rooted in the principles of physics and the mathematical formulations that describe the behavior of electric charges and currents.
One way to understand this is through the concept of special relativity. According to special relativity, electric and magnetic fields are two aspects of the same phenomenon, known as the electromagnetic field. When a charge moves, its electric field undergoes transformations that result in the appearance of a magnetic field in the frame of reference of an observer moving with the charge.
In simple terms, as a charged particle moves, its electric field undergoes changes that give rise to a magnetic field. This interplay between electric and magnetic fields is a fundamental feature of electromagnetism and is beautifully encapsulated in Maxwell's equations, which describe how electric and magnetic fields interact and propagate through space.
In summary, the "why" behind a moving charge creating a magnetic field is deeply tied to the fundamental nature of electromagnetic interactions, as described by the laws of electromagnetism and special relativity. It's a consequence of the way electric and magnetic fields are interconnected in the fabric of the universe, as articulated by the mathematical models developed by physicists over the years.
You nailed the fundamental question, what I call, "Duality Hole".
If a Charge particle is moving with respect to an Observer, the observer see Magnetic Field around it.
But, if a second observer is moving along the charge particle, he will not see the magnetic field around the charge.
That means, in the same Space Magnetic Field exist and does not exist. It is all about frame of reference movement.
To solve the mystery, the Space Time Transformation with respect to speed was introduced, first by French Physicist Lawrence.
If you plug the Relative Velocity instead of simple velocity into Maxwell equations, speed of Light come out to be Constant, irrespective of Frame of reference.
I failed my class 9th and 12th but seeing him explaining this is just soo oddly relaxing 🤔😁 #spreadlove
Gand mara
@@jeestudent6758 chal pant utaar bhosdike 😆
Searching on Internet, I found that the colours of electrons, protons and neutrons are blue, red and green respectively. Now, atoms form matters. So if the colour of all atoms(electrons, protons,neutrons) are same of all elements. So we must see same colour around us due to reflection of light. But this is not so. Why??? What are colours???
Why some objects reflects light in such a way, the object looks of varied colours???
By the way I know the concept of diffraction of light, as light is itself composed of 7 colours.
Class- 10 Student's Question.
Don't believe in colors. World is colourless, its only because of human eyes and processing of brain this world is perceived colourful around us.
To understand about "What are colors" understand "How human eye works".
In common use of English, "how" and "why" are often used as if they have the same definition. In physics, if one speaks carefully, only "how" should be used. Physicists can explain how a change of this or that is manifested, but can never answer why. "Why" requires a meta-physical explanation, but none are available that will satisfy everyone. Note that "why" implies there is motive or intent, while "how" does not.
The "why" of physics is completely mysterious. Sometimes, quite often, physics can explain "how". It makes no sense that any particle has a charge but it seems that they do have such. It makes even less sense that moving charges would produce a magnetic field...why that instead of making butterflies or rivers? At the base of physics are axioms...understanding beyond the axiom is impossible, which is part of the definition of axiom.
BTW, the explanation for charges and magnetism emerging from moving charges is withing the scope of understanding of year 10 students...maybe even year 8 or 6, since it is only an explanation of a magical property of matter that has been observed, not too much different than any observation.
You nailed it. Maths & models can't explain - only describe. Has anyone here actually defined the term "field"? Or "magnetism"? Nope. Nobody. What is the difference between dielectricity & magnetism? Gravity? Electricity? Nobody defines these in an of themselves. Einstein got at least one thing right, if you can't explain it, you probably don't understand it. Define your terms. Descriptions are not definitions.
@@mccoytg1 So true!
Perfect answer.
I am pretty sure the meta physical interpretations will make sense only when one has a very very strong grip on the theories of electro magnetism. There's probably "some" deeper meaning but realising what it means would probably require an in depth understanding of physics, something which is only possible after years of rigourous studies.
I noticed quite the same thing in medicine and surgery, on the face of it, it's entirely, entirely observational, but an in depth enquiry into all the observations creates a "synergism" that improves your understanding of the human body as a whole. Probably gives you a deep insight into how it all works. It's how surgeons are able to manage complex cases every day. There's NO set of guidelines as to how to approach each and every patient, but a well educated surgeon uses his understanding and intellect to predict the effects of what he's going to do, what's rational or not. Of course, surgery is much more simpler than, let's say, predicting the behaviour of black holes. Physics is more abstract, and that's why developing an innate understanding of physics is tougher.
Hlo sir ! I am Divyansh Kumar Singhania.
I have a doubt which has not cleared yet from internet or elsewhere. Sir, my question is that
In ampere's law why we add only those currents which are inside the loop and on the other side magnetic field (B) is considered as resultant of all the currents in that area.....why???
Sir please answer, I am eagerly waiting for your response.
Analogous to this, if a person moves in the society with a great zeal to do good (charge) he automatically builds a great luminous legacy (magnetic field) which everyone admires
good example brother
Wow !! Awesome
In simple, magnetic field is electric field observer experience in different frame of reference, this is a consequence of special theory of relativity's length contraction. as the charges moving, the number of charges per unit length increases bcz charge frame is under motion, so you feel greater electric field strength than if you are moving with the charge, this extra force we refer as magnetic force. And note this phenomenon is always inevitable process, so we use the term electro-magnetic field in all our study. and why the magnetic force is right angle to moving charge?. that is bcz, if you put a another charge in place of observer the force makes charge moving in right angle direction.
like this we can frame lot of questions, and you can see, how many things are connected, the theory which meant to describe speed and time has wider scope to answer many un-answered questions in classical-mechanics, electro-magnetism and so on..
always go a step further to see the beauty.
thank you - question everything!
When there isn't a potential difference, 1 electron moves left and 1 moves Right. So they Cancel each other out. However when there is a PD. Both move Right with gaps between them.
I am also a class 10 student, and I am so perplexed by this question that it keeps reverberating in my mind. My question is why does electricity get induced. This property is used in generators too. Sir, I will be obliged to you if you can clear this doubt by replying to this comment.
I Love the way he answered the question both in manner and chosing what could be understood!
Great Physics teacher. Very nice explanation 👍
The answer to the question begins with a postulate of special relativity which states that the laws of physics is the same in all reference frames. In order to reconcile the fact that a charge can produce an electric field in one frame, and a magnetic field in another, we must assume that a charge produces an electromagnetic field, which is the generalization of the electric and magnetic fields that exists not only in space, but in spacetime. Under this assumption, you will see different projections of this electromagnetic field depending on your frame. In one frame, say the rest frame, the projection can be strictly an electric field, but in the "lab" frame, you will see a different projection which can include a magnetic field. These projections can be obtained by applying a linear transformation to the electromagnetic field known as a Lorentz transformation, which is a mathematical object that can take you from one frame to another.
I have great regards for you HC Verma sir. You are living legend and inspiration for all students.
Sir, I am from class 10. I also have a doubt regarding the fact that the electrons in the conductors move randomly, why don't they move in a specified path in the electron sea model?
Because electrons have force of attraction of different nuclei with positive charge around it, but when you provide external higher potential the electrons moves towards it but still bear attraction due to nuclei which tends to create resistance.
"Model"...electron sea model is a model,and it is not bound to show conformity with other models...Also reality happens,irrespective of the fact that you model it or not,forget about how.
You will learn the atomic model in class 12th there you will come to know
I have great respect for you as a teacher, but I must honestly say that I find these kinds of answers disheartening. They can contribute to a loss of interest in a subject. It's important to address curiosity in the moment, not defer it to future learning.
In the context of a RUclips video aimed at an audience eager for knowledge, a response like "you should do a course on special theory of relativity to find a better answer" may not be very satisfying. It's more helpful to provide at least a brief explanation that aligns with the viewer's current level of understanding.
I recognize this might be a common approach among many Indian teachers, I believe that immediate engagement and simpler explanations can be more inspiring for those seeking to learn.
Exactly my thoughts, I have immense respect for sir HC Verma but this video was just “you’ll learn in higher classes” like our NCERT textbooks.
Consider a neutral wire with some electrons and protons in equal numbers now let the electrons drift (current). Now imagine a proton near the wire moving with same velocity as the electrons in the wire , now here the theory of special relativity comes into play as in the frame of reference of proton, the proton and electrons in wire are moving with same velocity but proton in wire are not, hence the distance between the protons in the wire will decrease (by special relativity)which will increase the proton density in the wire therefore the proton outside will experience an electric field that will exert a force on the proton . Now if we look at this situation from non inertial frame the charge outside will appear to be moving so we have to consider a force in account of the moving charge which we call it magnetic force .
So basically magnetic field is an electric field just from different frame of reference.
yup he should have mentioned that :(
I understood that
In reality I didn't 😭
@@UnKnown-lf7bl here's a video about this
ruclips.net/video/1TKSfAkWWN0/видео.html
It totally depends on your frame if reference. If a charge is in motion and you are in ground frame then you will observe the magnetic field however if you are moving with the charge then you won't feel the effect of magnetic field but you will indeed observe the other component of electromagnetic wave that is electric field.
Sir I have a doubt in my mind which is something like this:
I always feel that momentum and Force are same is it true or there is any kind of diff.
Because im not getting the actual diff. between accleration and velocity it seems to be same...
Momentum somewhat tells the state of motion of the object but when momentum changes then cause of change is called as force in one of the many ways.
Thanks so much🙋🙋
Velocity and acceleration are not completely the same thing. Suppose a Car is moving with velocity 2m/s with a=3m/s² then acceleration tells you that it's velocity will increase with 3 m/s after every second. Then after 1 sec it's velocity become 5 m/s and after 2 sec it becomes 8 m/s. So 3 m/s gets added after every second. If this car is moving with constant velocity 2 m/s then it's acceleration is Zero. So acceleration tells us the rate at which velocity changes with respect to time.
Velocity is defined as rate change of displacement while acceleration is rate change of velocity
I think you yourself said the answer by asking the question!!The keyword is DIFFERENCE😊 In simple terms, Momentum refers to measure of motion(mass x velocity) ok and force is proportional to rate of change in momentum, means force refers to DIFFERENCE in momentum. If difference in momentum of a body from intial to final state is zero, force measured is also zero
Imagine if after he does some course on Special Relativity just to find out the question being reversed back as the answer. 🤣🤣🤣
See his website
@@AvinashKumar-kv2qi which
He said correct . To know more about the connection of electromagnetism and special relativity , there's a good video on minutephysics with a simple cat analogy .
I = Q/t
Current directly proportional to charge
Always current produces magnetic field
HENCE PROVED❤️
Sir.. I just love the way u say anything
A big fan sir!!
anything i search in electrodynamics, it takes me to "The special theory of relativity".
Yes, I never thought about this... I just accepted it as it was😄😄
From HC Verma's disciple
ruclips.net/video/3HMlvqwj6_Q/видео.html
Sir please answer this question On an open ground a motorist follows a track that turns to his left by an angle of 60 degree after every 500 m. Starting from a given turn specify the displacement of the motorist at the third, sixth and the eighth turn. Compare the magnitude of the displacement with the total path length covered by the motorist in each case.
Thank u sir and also I wish to meet u atleast once in my life...a lots of respect to u🙏
ruclips.net/video/dkK4Q53Amg0/видео.html
I'm not even a science guy. Understood nothing here. But came only for H C Verma sir.
Thank ful to RUclips. .for having this vdo on my home page😀
ruclips.net/video/dkK4Q53Amg0/видео.html
The thing I love that is your videos are knowledgeable and even comments are knowledgeable too!
If physics fascinates you then this channel is for you ruclips.net/user/shortsh1EvNcxfk7I?si=vwp-jsfBQ06qMTGs
His smile just made my day (: